Răspuns:
A = { 1, 3, 5, 7, 9, 11, 13, 15, 17}
Explicație pas cu pas:
x = 0 => 2 × 0 + 1 = 1
x = 1 => 2 × 1 + 1 = 3
x = 2 => 2 × 2 + 1 = 5
x = 3 => 2 × 3 + 1 = 7
x = 4 => 2 × 4 + 1 = 9
x = 5 => 2 × 5 + 1 = 11
x = 6 => 2 × 6 + 1 = 13
x = 7 => 2 × 7 + 1 = 15
x = 8 => 2 × 8 + 1 = 17
x = 9 => 2 × 9 + 1 = 19